90,000+Happy Customers
20+Years
WorldwideShipping
Cart
Free Report Included
Worldwide Shipping
30 Day Returns
Help Center Shipping Payment and Checkout Returns Certificates Contact Us
Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
Purple Untreated Gemstones
Red Untreated Gemstones
Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
Single
Pairs
Lots
Faceted
Cabochons
Clear All
1.80ctw Violet Amethyst, Heart, Transparent

1.80ctw Violet Amethyst, Heart, Transparent

6.3 x 6.1 mm

$ 13.80

View Gem
0.82ct Orange Zircon, Oval, VVS

0.82ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 20.42

View Gem
0.79ct Orange Sphalerite, Round, SI-I1

0.79ct Orange Sphalerite, Round, SI-I1

5.5 mm (calibrated)

$ 39.34

View Gem
1.10ct Yellow Citrine, Square, VVS

1.10ct Yellow Citrine, Square, VVS

6 x 6 mm (calibrated)

$ 7.67

View Gem
2.44ct Green Tourmaline, Emerald Cut, VVS

2.44ct Green Tourmaline, Emerald Cut, VVS

18 x 3.9 mm

$ 66.83

View Gem
1.18ct Brown Color-Change Garnet, Emerald Cut, VS

1.18ct Brown Color-Change Garnet, Emerald Cut, VS

6.3 x 5 mm

$ 94.27

View Gem
1.32ct Pink Morganite, Oval, VS

1.32ct Pink Morganite, Oval, VS

8.8 x 6.7 mm

$ 101.24

View Gem
1.39ctw Red Pyrope Garnet, Square, VS

1.39ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 10.66

View Gem
1.12ct Purple Spinel, Cushion, VVS-VS
Spinel Product Video (742832)

1.12ct Purple Spinel, Cushion, VVS-VS

6.1 x 5.6 mm

$ 185.92

View Gem
8.69ct Green Prehnite, Fancy, Translucent

8.69ct Green Prehnite, Fancy, Translucent

16.4 x 10.8 mm

$ 14.28

View Gem
13.53ct Yellow Citrine, Oval, VVS-VS

13.53ct Yellow Citrine, Oval, VVS-VS

18 x 13 mm (calibrated)

$ 74.12

View Gem
0.31ct Yellow Sphalerite, Oval, SI-I1

0.31ct Yellow Sphalerite, Oval, SI-I1

4.4 x 3.7 mm

$ 15.44

View Gem
39.60ctw Brown Tiger'S Eye, Fancy, Opaque

39.60ctw Brown Tiger'S Eye, Fancy, Opaque

30.8 x 9 mm

$ 21.70

View Gem
3.06ctw Yellow Citrine, Oval, VVS-VS

3.06ctw Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 16.77

View Gem
19.55ct Gray Hematite, Emerald Cut, Opaque

19.55ct Gray Hematite, Emerald Cut, Opaque

20 x 15 mm (calibrated)

$ 21.42

View Gem
0.93ct Green Peridot, Oval, VS

0.93ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 12.96

View Gem
2.29ct Orange Moonstone, Cushion, Translucent

2.29ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 4.57

View Gem
21.58ctw Multicolor Jasper, Oval, Opaque

21.58ctw Multicolor Jasper, Oval, Opaque

18 x 13 mm (calibrated)

$ 23.65

View Gem
39.37ct Black Nuummite, Oval, Opaque

39.37ct Black Nuummite, Oval, Opaque

25.7 x 21.8 mm

$ 164.77

View Gem
3.31ct Yellow Citrine, Oval, VVS-VS

3.31ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 23.07

View Gem
3.14ct Multicolor Labradorite, Marquise, Translucent

3.14ct Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 6.94

View Gem
1.78ct Violet Amethyst, Pear Shape, VVS-VS

1.78ct Violet Amethyst, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 11.70

View Gem
2.76ct Multicolor Labradorite, Marquise, Translucent

2.76ct Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 6.11

View Gem
22.05ct White Rainbow Moonstone, Pear Shape, Translucent

22.05ct White Rainbow Moonstone, Pear Shape, Translucent

25.8 x 14.9 mm

$ 153.73

View Gem
1 2 3
...
1605
Choose Page
1 - 1896

Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image